Gearing for gin-saw cleaners.



0. B. ROBERTSON.

BEARING FOR GIN SAW CLEANERS.

APPLICATION HLED JUNE 4,1917- Patentgd Dec. 11,1913

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OSBORN B. ROBERTSON, 0F GONZALES, TEXAS.

GEARING FOR GIN-SAW CLEANERS.

Specification of Letters Patent. Patented Dec, 1L1, 11917..

Application filed June 4, 1917. I Seria1No. 172,712.

' It is the object of the invention to pro-,

vide simple and effective means for gradually starting andacceleratingthe rotation of the gin saw cleaner as it is moved intooperative position to clean the saws, to avoid the sudden rotation ofthe cleaner and to speed it up as itmoves into engagement with the saws.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed, without departing from the spirit of theinvention.

The invention is illustrated in the accompanying drawing, wherein thefigure is a fragmental elevation of a gin including the cleaner, andgearing therefor.

The numeral 1 designates the drive shaft of the saws 2, and 3 indicatesthe cleaner for the saws, of the construction shown in said patent, orthe patent on gin saw cleaner No. 1,140,669. The cleaner 3 is mounted ona shaft i which is moved toward and away .from the shaft 1 and saws 2,by any suitable mechanism, such as disclosed in the first mentionedpatent, to move the cleaner into and out of engagement with the saws.

The gearing embodies a section wheel 5 secured upon the shaft 1, andcomposed of metal, fiber, or other suitable material, said wheel beingprovided with a V-shaped periphery providing opposite beveled surfaces6. A friction wheel or pinion 7 of smaller diameter than the wheel 5isfeathered upon the shaft 41 or otherwise mounted to slide thereon androtate therewith, and this wheel 7 is provided with a conical or beveledsurface 8 at one side. A wheel 9 of smaller diameter than the wheel 7has a conical orbeveled surface 10 confronting the surface 8 and thesmaller portions of the wheels 7 and 9 are attached together in anysuitable manner, so that said wheels rotate together as a unit.

The wheels 7 and 9 are shifted longitudinally when removed from thewheel 5, by means of a coiled expansion spring 11 surrounding the shaftt and confined between the wheel 7 and a collar 12 o-nsaid shaft, a stop13 beina mounted on a shaft to limit the movement 0 the wheels 7 and 9,the whee contacting with said stop.

Theoperation of the gearing is as follows: When the shaft 4k is moved tobring the cleaner into engagement with the saws, for'cleaning thelatter, the shafts in being moved toward one another relatively, willcause the marginal portion of the wheel 7 to overlap one beveled surfaceof the wheel 5 which frictiona-lly engages the beveled or conicalsurface 8 of the wheel 7. The frictional engagement of said wheel? withthe wheel 5, will cause the wheel 7 to be rotated by the wheel 5 whichcontinues to rotate during the operation of the saws. Consequently, thewheel 7 will be given a slow initial movement by the wheel 5, therebystarting the rotation of the cleaner, and as the cleaner is moved intooperative position,

the wheel 7 will be forced against the tens1on of the spring 11 by thecam action between the beveled surface 8 and the correspending beveledsurface 6 of the wheel 5, it

being noted that as the shaft 4: is moved nearer to the shaft 1, thepoint of contact between the wheels 5 and 7 will shift closer to theaxis of the wheel 7, thereby increasing the ratio of rotation betweensaid wheels, and accelerating the rotation of the wheel 7 and cleaner.When the cleaner reaches operative position, the wheel 9 is brought intoengagement with the other beveled surface 6 of the wheel 5, the\l-shaped edge of the wheel 5 having a wedge fit within the V-shapedannular groove between the beveled surfaces 8 and 9, whereby the cleanerwill now be rotated at its greatest speed, and faster than the saws, toclean them. When the cleaner is moved away from the saws, the gearingwill be restored to normal position, as seen in the drawing. The wheels7 and 9 constitute a friction pinion having an annular V-shaped groove,one inclined Wall being of greater height than the other for theengagement of the wheel 5 therewith, and to shift the pinionlongitudinally as it is moved completely into engagement with the wheel5.

Having thus described the invention, what is claimed as new is:

l. A gearing embodying a wheel'and a pinion movable toward and away fromone another, one of them being shiftable and held yieldingly againstshifting movement, the pinion having opposite beveled surfaces, and thewheel having opposite beveled surfaces, one of which is movable intoengagement with one of the beveled surfaces of-the ,pinion when thepinion and wheel are moved toward one another, to start and acceleratethe relative rotation of said wheel andpinion, the other beveledsurfaces thereof being movable into engagement when the movement of saidwheel and pinion toward one another is completed.

2.,A gearing embodying a wheel and a pinion movable toward and away fromone another, one of them being shiftable yieldaloly, the wheel having a\l-shaped peripi1- ery providing opposite beveled surfaces, and thepinion having a V-shaped groove providing confronting beveled surfacesfor the engagement of the beveled surfaces of the wheel, said groove andwheel being offset in different planes, one of said surfacesofthe pinionbeing extended for the engagement therewith of the corresponding beveledsurit, the pinion having an annular V-shaped I groove providingconfronting beveled surfaces for the engagement of the beveled surfacesof said wheel, a spring moving the pinion so that onebeveled surface ofthe pinion is engaged by the corresponding beveled surface of the wheelbefore the others, during the movement of the shafts toward one another,the first mentioned beveled surface of the pinion being extended to beengaged by the corresponding beveled surface of the wheel during themovement of the shafts toward one another, to start and accelerate therotation of the second mentioned shaft.

In testimony that I claim the foregoing as my. own, I have heretoaflixed my signature in the presence of two witnesses.

' OSBORN B. ROBERTSON.

Witnesses H. W. Ronnn'rson, Jr., J. C. BRIGHT,

Copies of this patent may be obtained for five cents. each, byaddressing the Commissioner of Patents,

. Washington, D. C.

